Steam-jet furnace.



T. LANGER.

STEAM JET FURNACE.

APPLICATION FILED JUNE 7, 1912.

Patented Jan. 5, 1915.

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T. LANGER.

STEAM JET FURNACE.

APPLIGATIOH FILED JUNE-7, 1912.

1 1241335 Patented 31111.5, 1915.

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UNlTED %TATEE% PATENT @FFTCE THEODOR LANGER, 0F VIENNA, AUSTRIA-HUNGARY.

STEAM-JET FURNACE.

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Application filed. June 7, 1912.

To all whom it may concern:

Be it known that I, Trmooon LANGER, engineer, a subject of the Emperor of Austria- Hungary, and a resident of Vienna XIX, 36 Sieveringerstrasse, in the Empire of Austria-Hungary, have invented Improvements in Steam-Jet Furnaces; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to steam-j et furnaces, for locomotive boilers and the like, which are substantially so arranged that when the artificial draft is operating, 5. 6. when the regulator is open or the auxiliary blast is turned on, the steam-jet nozzles in the furnace are fed by pipes controlled from the regulator or the auxiliary blast, whereas when the natural draft only is operating, 2'. e. the smoke-stack draft, the nozzles are fed from the boiler by means of a direct pipe which is provided with a closure device, so that after the gas has been completely removed from the burning layer of fuel, the steam-jet which then exercises a cooling elfect like an excess of air, can be shut ofi, whereupon it is opened again when the door is again opened.

One defect owing to the direct pipe being able to be closed or opened by hand at any time is that this pipe can be closed at a time when the layer of burning fuel is still fully glowing, so that the steam nozzles are soon burnt owing to their being insufficiently cooled. Secondly the pipe may be opened unintentionally, e. g. by opening the door, when steam is shut off from the locomotive, so that the steam-jet acting as a cooling agent causes leakage in the furnace flues. Moreover, for the proper working of the steam-jet when the regulator or auxiliary blast is open, it is essential that the nozzles be fed with a constant, exactly predetermined quantity of steam, but this is not the case when the nozzles are irregularly fed by the manually-adjusted, direct pipe.

A primary object of my invention is to obviate these defects.

To this end, I provide that the nozzles are fed with so much steam when the throttle lever regulator or the auxiliary blast is open Specification of Letters Patent.

Fatented Jan. 5, 1915. Serial No. 702,271.

that the steam-jet influences the combustion in the furnace, while the direct pipe is provlded with a regulating device which is preferably not adjustable by hand, or at least not directly so, and is preferably independent of other arrangements for the furnace, by means of which device the supply of steam to the nozzle can be brought to an exact amount once for all, so that no action on the fire and the flue walls can occur, but sufficient steam is provided to fill the nozzles and to prevent them from being burnt. This regulating device is safeguarded against unauthorized and accidental disturbance. Such a device prevents smokewhen the engine is stationary or running light owing to the auxiliary blast being turned on to a suitable extent, and if necessary by suitably opening the furnace door, so that when the regulator and auxiliary blast are closed no other effect than that of cooling the nozzle takes place owing to steam being fed by the direct pipe to the nozzle.

The novelty of the present improved steam-jet furnace therefore consists in the steam-pipe led directly from the boiler to the nozzle being provided, in like manner as the pipes fed from the steam regulator and auxiliary blast, with a preferably regulatable throttling member not adjustable by hand, or at least not readily so, so that under all running conditions a constant quantity of steam passes to the nozzles. The advantage of this arrangement is that the device no longer needs the attention involved in varying the effective area of the passage during the operation of the engine.

My invention is however applicable to any steam-jet furnace in which the cooling pipe, containing the said throttling member, together with the steam pipes which feed the nozzles for the purpose of influencing combustion are so arranged that the said cooling pipe is not affected by the closure devices of the latter pipes.

One illustrative embodiment of my invention and a modification thereof are represented by way of example in the accompanying drawing, wherein:

Figure 1 shows the application of the invention to a locomotive. Fig. 1 is a front rect pipe flowing away to elevation showing the general arrangement of my improved apparatus; Fig. 2 is a section showing one form of the adjusting device arranged in the direct pipe, and Figs. 3 and 4 are vertical sections and Fig. 5 is a top plan view, respectively, showing one form of the supporting member for the steam-jet nozzle in the firebox.

Referring firstly to Fig. 1 the reference character 1 denotes the pipe which is controlled by the throttle lever, said pipe being connected in the usual manner with the steam chest of the engine, and 2 denotes the pipe fed from the auxiliary blast; 3 denotes the direct pipe from the boiler, 4: the common feed pipe to the nozzles in the fire-box and 5 the regulating device for said pipe 3 which for simplicity is simultaneously employed in the illustrative embodiment for connecting the direct pipe to the boiler.

The regulating device shown in Fig. 2 comprises a casing 6, in which a regulating screw 7 controls the effective area of the duct. A cap 8 fitting on the casing above the regulating screw prevents the leakage of steam and secures this regulating screw from being displaced. To prevent this screw being tampered with, this cap is provided with a lead seal. In the form of the regulating device shown in Fig. 2 this device constitutes a connection to the boiler 20.

Referring now to Figs. 3, 1 and 5, the pipe 1 controlled by the throttle lever enters at 1*, the pipe 2 controlled by the auxiliary blast enters at 2 and the pipe 3 directly connected to the boiler and containing the throttling member enters at 3. The carrier 17 is arranged above the furnace door and the feed pipe a carrying the steam-jet nozzle 21 is. fastened into the carrier by means of a vertical plug 10 secured against turning by a projection 11 or the like; this device has an advantage over other known forms in that the steam-jet nozzle can at any time be easily removed, examined, and inserted exactly in their original position. Within this carrier at the ends of the two ducts 1 and 2 controlled by the throttle lever and the auxiliary blast, respectively, are two non-return valves 11 and 12 for preventing the cooling steam from the dithe steam chest 23 or the auxiliary blast. For regulating the openings of the two ducts 1 and 2 I provide set-screws 13 and 14, which limit the lift of the non-return valves. Screwed caps 15 and 16 are attached to this carrier 17 and cover the set-screws, thus preventing leakage of steam.

Having now described my invention what I claim and desire to secure by Letters Patent of the United States is 1. In steam jet furnaces the combination with a steam nozzle having openings for admitting steam jets above the fuel in the fire box and pipes feeding steam thereto for producing the steam jets, one of said pipes being supplied with steam from the steam chest and the other from the auxiliary blast, of a separate independent pipe admitting steam to the nozzle only in such quantity as to cool the nozzle by filling it with steam without acting upon the fuel when the pipes for feeding the steam jet are closed, substantially as described.

2. In steam jet furnaces the combination with a steam nozzle having openings for admitting steam jets above the fuel in the fire box and pipes feeding steam thereto for producing the steam jets, one of said pipes being supplied with steam from the steam chest and the other from the auxiliary blast, of a separate steam pipe connected directly with the boiler and being independent from the regulating devices of the furnace, means for adjusting the supply of steam through said pipe so as to admit an exact amount of steam to the nozzle sufficient to fill it with steam and to cool it without influencing the fuel in the fire-box when the pipes for feeding the steam jets are closed, substantially as described.

3. In steam jet furnaces the combination with a steam nozzle having openings for admitting steam jets above the fuel in the fire box and pipes feeding steam thereto for producing the steam jets, one of said pipes being supplied with steam from the steam chest and the other from the auxiliary blast, of a separate steam pipe connected directly with the boiler and being independent from the regulating devices of the furnace, means for adjusting the supply of steam through said pipe so as to admit an exact amount of steam to the nozzle suflicient to fill it with steam and to cool it without influencing the fuel in the fire-box when the pipes for feeding the steam jets are closed and means for protecting said throttling device against unauthorized and accidental disturbance.

4. In steam jet furnaces the combination with a steam nozzle having openings for admitting steam jets above the fuel in the fire box and pipes feeding steam thereto for producing the steam jets, one of said pipes being supplied with steam from the steam chest and the other from the auxiliary blast, of a separate steam pipe connected directly with the boiler and being independent from the regulating devices of the furnace, means for adjusting the supply of steam through said pipe so as to admit an exact amount of steam to the nozzle sufficient to fill it with steam and to cool it without influencing the fuel in the fire-box when the pipes for feeding the steam jets are closed, a valve housing mounted outside of the fire box, checkwithin said housing,

housing, substantially valves being located In testimon and controlling the name to this s Vitnesses as described. AUGUST y whereoi I have signed my pecification in the presence of two subscribing Witnesses.

THEODOR LAN GER.

HERMAN WUNDERLIOH,

FUGGER.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner ot Patents,

Washington, D. C. 

